Re: [tGarden-dev] Re: name and source of 5 pin serial connector?

[Stock <st...@v2...>]

At 01:28 PM 9-4-02 +0200, nik gaffney wrote:

> > By the way:
> > There is another upcoming project her at the Lab where we MAY want to use
> > ADXL's again...
> > it could happen that i re-design the sensorsets,
> > hopefully being able to integrate 2 or 4 sensors & the pic on ONE, flexible
> > circuitboard...
>
>the flexible cuicuit boards are very nice, if only the componets could be
>more rubbery also!

That's OK if they are small enough, though, isn't it? :-)

>we have recenlty gone thru the stamp code in the process of making some new
>sensor sets, and found a few problems. (ill update the cvs when i get a
>chance) there a a few things which could be called 'bugs' and a few which are
>more likely 'design decisions'
>
>the most obvious change is to leave the sensors constinuously powered, rather
>than cycling them, and having to wait 6ms for each chip to stabaliise (which
>is not always long enough) considering each chip draws 1mA when powered (vs a
>few microamps when off) its a power trade off.  accuracy + data rate are more
>important at the moment (considering the stamp takes anywhere from 20-60mA)

Oh, i C :)

yeah, quite right, this 'design decision' was made when i still tought it
would be possible to power PIC + sensors from the iPAQ,
Before we had the PIC-batteries...
So it's obolete indeed :), but keep in mind that the PIC still has to
alternate power to the sensors when 'reading' more then one ADXL,
because of the input-wiring!


OkDan!

StK